react-native-picker


!ui3
!ui4

$3

#### Params

|Key | Type | Default| Support | Description |
| --- | --- | ---- | ------ | ----------- |
|isLoop | Boolean | false | Android | |
|pickerTextEllipsisLen | number | 6 | Android | |
|pickerConfirmBtnText | string | confirm | iOS/Android | |
|pickerCancelBtnText | string | cancel | iOS/Android | |
|pickerTitleText | string | pls select | iOS/Android | |
|pickerConfirmBtnColor | array | [1, 186, 245, 1] | iOS/Android | |
|pickerCancelBtnColor | array | [1, 186, 245, 1] | iOS/Android | |
|pickerTitleColor | array | [20, 20, 20, 1] | iOS/Android | |
|pickerToolBarBg | array | [232, 232, 232, 1] | iOS/Android | |
|pickerBg | array | [196, 199, 206, 1] | iOS/Android | |
|pickerToolBarFontSize | number | 16 | iOS/Android | |
|wheelFlex | array | [1, 1, 1] | iOS/Android | |
|pickerFontSize | number | 16 | iOS/Android | |
|pickerFontColor | array | [31, 31, 31, 1] | iOS/Android | |
|pickerFontFamily | string | | iOS/Android | |
|pickerRowHeight | number | 24 | iOS | |
|pickerData | array | | iOS/Android | |
|selectedValue | array | | iOS/Android | |
|onPickerConfirm | function| | iOS/Android | |
|onPickerCancel | function| | iOS/Android | |
|onPickerSelect | function| | iOS/Android | |

#### Methods

|Key | Support | Description |
| --- | ---- | ----------- |
|init | iOS/Android |init and pass parameters to picker |
|toggle | iOS/Android |show or hide picker |
|show | iOS/Android |show picker |
|hide | iOS/Android |hide picker |
|select | iOS/Android |select a row |
|isPickerShow | iOS/Android |get status of picker, return a boolean |

$3

#### Step 1 - install

``javascript
npm install react-native-picker --save
`

#### Step 2 - link

`
react-native link
`

#### Step 3 - import and use in project

`javascript
import Picker from 'react-native-picker';
let data = [];
for(var i=0;i<100;i++){
data.push(i);
}

Picker.init({
pickerData: data,
selectedValue: [59],
onPickerConfirm: data => {
console.log(data);
},
onPickerCancel: data => {
console.log(data);
},
onPickerSelect: data => {
console.log(data);
}
});
Picker.show();

`

$3


The Podfile will like below:
` ruby
platform :ios, '8.0'
target 'YourTarget' do
pod 'React', :path => '../YOUR_REACT_NATIVE_PROJECT/node_modules/react-native', :subspecs => [
'Core',
...
]
pod 'Picker', :path => '../YOUR_REACT_NATIVE_PROJECT/node_modules/react-native-picker'
end
`
After you have updated the Podfile of the existing app, you can install react-native-picker like below:
` bash
$ pod install
`

$3

#### support two modes:

1. parallel: such as time picker, wheels have no connection with each other

2. cascade: such as date picker, address picker .etc, when front wheel changed, the behind wheels will all be reset

#### parallel:

- single wheel:

`javascript
pickerData = [1,2,3,4];
selectedValue = 3;
`

- two or more wheel:

`javascript
pickerData = [
[1,2,3,4],
[5,6,7,8],
...
];
selectedValue = [1, 5];
`

#### cascade:

- two wheel

`javascript
pickerData = [
{
a: [1, 2, 3, 4]
},
{
b: [5, 6, 7, 8]
},
...
];
selectedValue = ['a', 2];
`

- three wheel

`javascript
pickerData = [
{
a: [
{
a1: [1, 2, 3, 4]
},
{
a2: [5, 6, 7, 8]
},
{
a3: [9, 10, 11, 12]
}
]
},
{
b: [
{
b1: [11, 22, 33, 44]
},
{
b2: [55, 66, 77, 88]
},
{
b3: [99, 1010, 1111, 1212]
}
]
},
{
c: [
{
c1: ['a', 'b', 'c']
},
{
c2: ['aa', 'bb', 'cc']
},
{
c3: ['aaa', 'bbb', 'ccc']
}
]
},
...
]
``

$3